Cam-cylinder for knitting-machines



u mel') R. KIR'KPAITRIGK- CAM' fYLINDIR FOR KNITTING MAGHINES.'

Patented Feb.` 7, 1893.

UNITED STATES yPATENT l OFFICE.

EoeEE KIRKPATEICK, on PHILADELPHIA, PENNSYLVANIA.

CAM-CYLINDER FOR KNITTING-MACHINIES.

SPECIFICATION forming part of Letters Patent No. 491,118, dated February 7,1893. v

Application tiled Jnne 5, 1890. Renewed June 15, 1891. Again renewed December 24, 1891. Again renewed July 6.1892.

. Serial No. 439,185. (No model.)

.To @ZZ whom it may concern:

Be it known that I, ROGER KIRKPATRICK, a British subject, residing in the cityT of Philadelphia, State of Pennsylvania, have invented a new and useful Improvement in Cam-Cyl inders for Knitting-Machines, of which invention the following is a specication.

This invention relates to all rotary knitting machines and especially to weft thread machines.

The object of myinvention is so to construct Y cam-cylinders that the needles with their jacks and cranks shall be exposed to View throughout the whole of their circuit, and also that the lint which is constantly being deposited on the needles and jacks when the machine is in operation interfering with the action of these parts can automatically pass down and out.

My invention consists of a cam-cylinder wherein two plain rings, properly stayed, support in the open space between themaskeleton or open cam-race as below set forth.

In the annexed drawings, Figure l is a top viewl of a knitting machine, showing the supporting table, the annular seat thereon for the cam-cylinder, the upper ring of this cylinder, the upright braces by which the upper ring and lower ring of the cam-cylinder are held together; showing also the needle cylinder,

the usual annular space between said two cylinders, and the lugs and screw bolts by which the cam-cylinder is. adj usted up and down as required to change the length of the stitch; Fig. 2 is a side elevation of the table (legs omitted) the annular seat thereon and the cam-cylinder; Fig. 3 a section of the cam cylinder on the line of Fig. 2; Fig. 4 a section of the same on the line y, y of Fig. 2;

showing also a needle with its jack and crank 4o in elevation. Fig. 5 is a side elevation of a portion of the bars forming the cam-race, on an enlarged scale.

In Figs. l and 2 d represents a table, and b an annular seat thereon; these parts being in the usual form.

c represents the upper ring, d the lower ring of the cam-cylinder, and e the upright braces by which the rings c and dare held together.

f and g represent bars preferably made of 5o polished steel, secured in the open space between rings c and d, `and forming the camrace h. These bars are made of :suflicient Width to admit of their being fastened to the rings c and d near their outer edges as shown in Figs. 3 and 4, leaving space rsufficient for the clear passage of the projection, or crank j of the needle jack lc, (see Fig. 4.)

Z, Figs. 1 and 2 represents lugs of` ring d; Z Fig. 2, lugs of seat h, which seat is secured to table ot by screws ror any other sufcient fastenings. m represents screw bolts; n collars integral with bolts m respectively; p represents nuts., By means of these devices the cam cylinder as a whole is secured to seat b and also as occasion may require to produce a shorter or longer stitch', is adjusted up and down. o

. I claim:

In a rotary knitting Inachinea cam-cylinder consisting of two plain rings braced together with an intervening space between them, Vand supporting in said space a skeleton or open cam-race, substantially set forth.

ROGER KIRKPATRICK.

Witnesses:

J. E. SHAW, E. l-I. BAILEY. 

